Production method of aluminium fluoride

A production method, the technology of aluminum fluoride, applied in the direction of aluminum fluoride, aluminum halide, etc., can solve the problems of large investment in dry process equipment, high price of production process raw materials, high production cost, etc., and achieve abundant reserves, increased bulk density, physical The effect of performance improvement

Inactive Publication Date: 2006-09-13
DO FLUORIDE CHEM CO LTD
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw material price of the above-mentioned production process is high, and the production cost is high; the investment of dry process equipment is large, and the process is complicated

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The production method of aluminum fluoride in this embodiment is as follows: the mother liquor dilute sulfuric acid and concentrated sulfuric acid are prepared into a sulfuric acid solution with a concentration of 200g / l, and react with kaolinite in a pressurized reactor at a reaction temperature of 135°C and a reaction time of 1 Hours; after the reaction, filter to obtain an aluminum sulfate solution with an aluminum ion content of 42g / l; react and crystallize the aluminum sulfate solution and hydrofluoric acid, the crystallization temperature is 140°C, after the crystallization is completed, filter and wash to obtain less than one crystal water of fluorine aluminum, and then dried and dehydrated to produce aluminum fluoride products, and the mother liquor dilute sulfuric acid is returned for use.

Embodiment 2

[0015] The production method of the aluminum fluoride of the present embodiment is as follows: the mother liquid dilute sulfuric acid and concentrated sulfuric acid are prepared into a sulfuric acid solution with a concentration of 250g / l, and react with kaolinite in a pressurized reactor, the reaction temperature is 140°C, and the reaction time is 1.5 Hours; after the reaction is over, filter to obtain an aluminum sulfate solution with an aluminum ion content of 55g / l; react the aluminum sulfate solution with hydrofluoric acid to crystallize, the crystallization temperature is 150°C, and after the crystallization is completed, filter and wash to obtain less than one crystal water of fluorine aluminum, and then dried and dehydrated to produce aluminum fluoride products, and the mother liquor dilute sulfuric acid is returned for use.

Embodiment 3

[0017] The production method of the aluminum fluoride of the present embodiment is as follows: the mother liquor dilute sulfuric acid and the concentrated sulfuric acid are mixed into the sulfuric acid solution that concentration is 300g / l, react with kaolinite in the pressurized reactor, reaction temperature 145 ℃, reaction time 2 Hours; after the reaction is over, filter to obtain an aluminum sulfate solution with an aluminum ion content of 60g / l; react the aluminum sulfate solution with hydrofluoric acid to crystallize, the crystallization temperature is 160°C, and after the crystallization is completed, filter and wash to obtain less than one crystal water of fluorine aluminum, and then dried and dehydrated to produce aluminum fluoride products, and the mother liquor dilute sulfuric acid is returned for use.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
concentrationaaaaaaaaaa
Login to view more

Abstract

A process for preparing aluminum fluoride from kaolinite and hydrofluoric acid includes such steps as pulverizing kaolinite, reaction between sulfuric acid solution and said kaolinite, filtering to obtain aluminum sulfate solution, reacting on dyrofluoric acid, crystallizing, filtering, washing and drying. It has low cost.

Description

technical field [0001] The invention relates to a method for producing aluminum fluoride by using kaolinite and hydrofluoric acid as raw materials. Background technique [0002] Aluminum fluoride is used as an additive in the production of electrolytic aluminum to lower the melting point of the electrolyte and increase the conductivity of the electrolyte. Its traditional production process is hydrofluoric acid-dry method and hydrofluoric acid-wet method. Hydrofluoric acid—the raw materials of the dry process are hydrogen fluoride and aluminum hydroxide. The production process includes pretreatment of aluminum hydroxide to remove crystal water, and then fully mixes and reacts with hydrogen fluoride gas in powder form at 500-600°C. Aluminum trifluoride is generated at the bottom of the reactor, and the aluminum trifluoride is sent to the drum for cooling to obtain the finished product. Hydrofluoric acid - the raw materials of the wet process are hydrofluoric acid and aluminu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/50
Inventor 李世江侯红军杨华春皇甫根利闫春生于贺华张良
Owner DO FLUORIDE CHEM CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap